lesson21_Maya API 的全局操作方法 - MGlobal
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可以用截图软件看到maya视图的大小，比如我测出来是大约：723 X 556
那么用maya的openMayaUI 模块下的M3dView中的 portWidth 和 portHeight 也可以精确的测量出视图的大小：
import maya.OpenMayaUI as omUI
view = omUI.M3dView.active3dView()
view.portWidth() # 707
view.portHeight() # 549
然后用MGlobal下的selectFromScreen 来选择视窗范围内的物体：
比如选择正中央的一块区域：
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import maya.OpenMaya as om
om.MGlobal.selectFromScreen(310, 220, 380, 320, om.MGlobal.kReplaceList)
2.lesson22_Maya API 的文件操作 - MFileIO
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import maya.OpenMaya as om
import maya.cmds as cmds
sg_node = cmds.ls(type='shadingEngine')
cmds.select(sg_node, ne=True)
om.MFileIO.exportSelected("C:\Users\KangTa\Desktop\sg_tes.ma", 'mayaAscii')
扩展下导出场景中使用过的材质球
import maya.OpenMaya as om
import maya.cmds as cmds
# 列出场景中使用的材质球
def get_used_materials_in_scene():
"""list the material used in scene
"""
for shading_engine in cmds.ls(type='shadingEngine'):
if cmds.sets(shading_engine, q=True):
for material in cmds.ls(cmds.listConnections(shading_engine), mat=True):
yield material
all_material = list(get_used_materials_in_scene())
cmds.select(all_material, r=True)
om.MFileIO.exportSelected("C:/Users/KangTa/Desktop/sg_test.ma", 'mayaAscii')
3.lesson23_Maya API 中的节点迭代器和函数类
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m_sel = om.MSelectionList()
mat_iter = om.MItDependencyNodes(om.MFn.kShadingEngine)
while not mat_iter.isDone():
m_sel.add(mat_iter.item())
# m_sel.add(om.MFnDependencyNode(mat_iter.item()).name())
mat_iter.next()
om.MGlobal.setActiveSelectionList(m_sel)
om.MFileIO.exportSelected("C:/Users/KangTa/Desktop/sg_test.ma", 'mayaAscii')
